@misc{Billich_Anton_Günther_(1598–1640)_Observationum,
 author={Billich, Anton Günther (1598–1640)},
 address={Lugduni Batavorum},
 howpublished={online},
 publisher={Maire, Joannes. Druk.},
 language={lat},
 title={Observationum ac paradoxorum chymiatricorum libri duo [...].},
 keywords={Kolekcje Piastowskie, 17 w., chemia},
}